MR VACUTAP VM-Ex Installation And Commissioning Instructions Download Page 67

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5 Mounting

Maschinenfabrik Reinhausen GmbH 2020

5293079/01 EN

VACUTAP

VM-Ex

Vacuum-drying in the transformer tank

1. Heat up the on-load tap-changer in air at atmospheric pressure with a

temperature increase of approximately 10 °C/h to a final temperature of
maximum 110 °C.

2. Pre-dry the on-load tap-changer in circulating air at a maximum tempera-

ture of 110 °C for a period of at least 20 hours.

3. Vacuum-dry on-load tap-changer at between 105 °C and maximum

125 °C for at least 50 hours.

4. Residual pressure of no more than 10

-3

bar.

If you wish to perform another transformer ratio test after drying, proceed as
described in the section "Performing transformer ratio test following dry-
ing" [

►

Section 5.3.9, Page 81].

5.3.7.2 Vapor-phase drying in the transformer tank

If you have opened the kerosene drain plug already (e.g. after the trans-
former ratio test), you can begin the drying [

►

Section 5.3.7.2.4, Page 78]

right away.

Otherwise, you first have to open the kerosene drain plug before you can be-
gin the drying.

5.3.7.2.1 Removing diverter switch insert

5.3.7.2.1.1 Moving on-load tap-changer to adjustment position

► Move the on-load tap-changer to the adjustment position. The adjustment

position is indicated in the on-load tap-changer connection diagram in-
cluded in delivery.

5.3.7.2.1.2 Removing on-load tap-changer head cover

WARNING

Danger of explosion!

Danger of death from explosive gases under the on-load tap-changer head
cover!

► Ensure that there are no open flames, hot surfaces or sparks (for exam-

ple caused by static charging) in the immediate surroundings and that
none arise.

► De-energize all auxiliary circuits (for example tap-change supervisory de-

vice) before removing the on-load tap-changer head cover.

► Do not operate any electrical devices during the work (for example risk of

sparks caused by impact wrench).

► Only use conductive and grounded hoses, pipes, and pump equipment

that are approved for flammable liquids.

Summary of Contents for VACUTAP VM-Ex

Page 1: ...On load tap changer VACUTAP VM Ex Installation and commissioning instructions 5293079 01 EN ...

Page 2: ... for compensation All rights reserved in the event of the granting of patents utility models or designs The product may have been altered since this document was published We reserve the right to change the technical data design and scope of supply Generally the information provided and agreements made when processing the individual quotations and orders are binding The original operating instruct...

Page 3: ...lication range of the on load tap changer 14 2 4 2 Standards and regulations 16 2 5 Measures for ensuring compliance with explosion protection requirements 17 2 5 1 Measures taken by the manufacturer 17 2 5 2 Measures to be taken by the transformer manufacturer operator 17 2 6 Personnel qualification 20 2 7 Personal protective equipment 22 3 Product description 23 3 1 Scope of delivery 23 3 2 On l...

Page 4: ...utoclave 64 5 3 7 Drying on load tap changer in transformer tank 66 5 3 8 Filling the oil compartment of the on load tap changer with insulating fluid 80 5 3 9 Performing transformer ratio test after drying 81 5 4 Installing on load tap changer in transformer bell type tank version 82 5 4 1 Inserting on load tap changer into supporting structure 82 5 4 2 Connecting the tap winding and on load tap ...

Page 5: ... without oil conservator 178 6 2 3 Transport with empty transformer tank 179 6 3 Commissioning transformer at operating site 180 6 3 1 Filling the oil compartment of the on load tap changer with insulating fluid 180 6 3 2 Bleeding on load tap changer head and suction pipe 181 6 3 3 Checking motor drive unit 183 6 3 4 Checking protective relay 184 6 3 5 Commissioning the transformer 185 7 Fault eli...

Page 6: ...or bell type tank installation 890180 199 9 6 On load tap changer head 893899 200 9 7 On load tap changer head with tap change supervisory control 894109 201 9 8 Pipe connection Q with tap change supervisory control 766161 202 9 9 Tracing template for on load tap changer head 890183 203 9 10 Socket wrench for kerosene drain plug 890182 204 9 11 Screw tools for installation and maintenance 890478 2...

Page 7: ...nfabrik Reinhausen GmbH Falkensteinstraße 8 93059 Regensburg Tel 49 9 41 40 90 0 E mail sales reinhausen com Further information on the product and copies of this technical file are avail able from this address if required 1 2 Completeness This technical file is incomplete without the supporting documents The following documents are considered supporting documents Unpacking instructions Supplement...

Page 8: ...ngs relating to sec tions Embedded warnings use the following format DANGER Instruction for avoiding a dangerous situation 1 4 1 3 Signal words and pictograms The following signal words are used Signal word Definition DANGER Indicates a hazardous situation which if not avoided will result in death or serious injury WARNING Indicates a hazardous situation which if not avoided could result in death ...

Page 9: ...derstanding of particular procedures In this technical file it is laid out as follows Important information 1 4 3 Instruction system This technical file contains single step and multi step instructions Single step instructions Instructions which consist of only a single process step are structured as fol lows Aim of action ü Requirements optional Step 1 of 1 ð Result of step optional ð Result of a...

Page 10: ...uction Maschinenfabrik Reinhausen GmbH 2020 10 5293079 01 EN VACUTAP VM Ex Aim of action ü Requirements optional 1 Step 1 ð Result of step optional 2 Step 2 ð Result of step optional ð Result of action optional ...

Page 11: ...nstallation and operation to removal and disposal The following is considered appropriate use Use the product only with the transformer specified in the order Only operate the product with the versions of the motor drive unit drive shaft and protective relay that have been approved for use in explosive ar eas The serial numbers of on load tap changer and on load tap changer ac cessories drive driv...

Page 12: ...plies to the affected transformer itself just as it does to transformers electrically connected in parallel or serially or other electrical machines Higher voltages may occur due to transformer overexcitation following load shedding for example Operations outside of the permitted operating conditions can lead to injury to persons and damage to the product Prevent any such operations outside of the...

Page 13: ...losive atmospheres Safety markings Warning signs and safety information plates are safety markings on the product They are an important aspect of the safety concept Observe all safety markings on the product Make sure all safety markings on the product remain intact and legible Replace safety markings that are damaged or missing Ambient conditions To ensure reliable and safe operation the product ...

Page 14: ...ith Maschinenfabrik Rein hausen GmbH Spare parts Spare parts not approved by Maschinenfabrik Reinhausen GmbH may lead to physical injury damage to the product and malfunctions Only use spare parts that have been approved by Maschinenfabrik Rein hausen GmbH Contact Maschinenfabrik Reinhausen GmbH 2 4 Standards and regulations 2 4 1 Application range of the on load tap changer The on load tap change...

Page 15: ...present continuously for long periods or frequently 2G 1 2D 21 Equipment in this category is intended for use in ar eas in which explosive atmospheres caused by gases vapors mists or air dust mixtures occur oc casionally 3G 2 3D 22 Equipment in this category is intended for use in ar eas in which explosive atmospheres caused by gases vapors mists or air dust mixtures are un likely to occur or if t...

Page 16: ...50 C T3 200 C 200 C 300 C T4 135 C 135 C 200 C T5 100 C 100 C 135 C T6 85 C 85 C 100 C Table 8 Temperature classes Equipment protection level EPL number 8 The EPL indicates the level of protection defined for a device based on the level of probability of ignition and taking into account the differences be tween potentially explosive gas atmospheres potentially explosive dust at mospheres and poten...

Page 17: ...compartment A temperature sensor is provided in the on load tap changer head cover for monitoring the oil temperature in the diverter switch oil compartment The corresponding temperature monitoring relay is in the TAPMOTION ED Ex Temperature monitoring prevents further switching of the on load tap changer when the maximum permitted temperature is reached This maxi mum permitted temperature is fact...

Page 18: ...g oil is present in the diverter switch oil compartment at all times Figure 1 On load tap changer oil system 1 Diverter switch oil compartment 5 Signaling contacts 2 Temperature sensor 6 Oil conservator 3 Protective relay 7 Dehydrating breather 4 Level indicator 2 5 2 3 Oil conservator to be used The oil conservator of the on load tap changer ensures that sufficient insu lating oil is present in t...

Page 19: ...he circuit breaker will immediately de energize the transformer when the oil level in the oil conservator falls below this minimum 2 5 2 3 4 Insulating oil to be used When filling the diverter switch oil compartment and its oil conservator use only new mineral insulating oil for transformers in accordance with IEC 60296 Specification for unused mineral insulating oils for transformers and switchge...

Page 20: ...lly painted The contact surface of the on load tap changer head is primed ex factory The through holes are primed and partially painted The transformer manufacturer is responsible for the design of the mating surfaces on the transformer and piping and that of the screw connections needed for these attachments 1 Provide suitable sealing to prevent electrolytes from entering sealing sur faces and ho...

Page 21: ...nd the poten tial dangers in the event of inappropriate handling as well as the protective devices and safety measures The electrically trained person works exclu sively under the guidance and supervision of an electrically skilled person Operator The operator uses and operates the product in line with this technical file The operating company provides the operator with instruction and training on...

Page 22: ... a low tearing strength with tight sleeves and with no protruding parts It mainly serves to protect the wearer against being caught by moving machine parts Safety shoes To protect against falling heavy objects and slipping on slippery surfaces Safety glasses To protect the eyes from flying parts and splashing liq uids Visor To protect the face from flying parts and splashing liq uids or other dang...

Page 23: ... the parts in a dry place until installation The product must remain in its airtight protective wrapping and may only be removed immediately before installation You will find more information in the Packaging transport and stor age Section 4 Page 36 chapter 3 2 On load tap changer 3 2 1 Function description On load tap changers are used to adjust the transmission ratio of transform ers without int...

Page 24: ...ective relay 4 Bevel gear 9 Oil conservator 5 Horizontal drive shaft 10 Active part of the transformer 3 2 2 Setup models The on load tap changer consists of the on load tap changer head oil com partment with built in diverter switch insert and the selector mounted below also available with change over selector on request The design and designation of the most important on load tap changer com pon...

Page 25: ...usen GmbH 2020 25 5293079 01 EN VACUTAP VM Ex For the number of maximum operating positions of the on load tap changer refer to the technical data Figure 4 VACUTAP VM 1 On load tap changer head 3 Selector 2 Oil compartment 4 Change over selector ...

Page 26: ... GmbH 2020 26 5293079 01 EN VACUTAP VM Ex Figure 5 VACUTAP VM 300 1 On load tap changer head 3 Change over selector 2 Oil compartment 4 Selector 3 2 2 1 Pipe connections The on load tap changer head features 4 pipe connections for different pur poses ...

Page 27: ...height If the on load tap changer is fitted with an oil suc tion pipe the on load tap changer can be completely emptied via pipe con nection S Pipe connection R Pipe connection R is intended for attachment of the protective relay and con nection of the on load tap changer oil conservator and can be interchanged with pipe connection Q Pipe connection E2 Pipe connection E2 is sealed off with a blank...

Page 28: ...3 Nameplate and serial number The nameplate with serial number is on the on load tap changer head cover Figure 7 Nameplate The serial number can also be found on the selector Figure 8 Serial number 3 2 4 Protective devices The on load tap changer is equipped with the following protective devices ...

Page 29: ... in the dry reed magnetic switch is thereby actuated the circuit breakers are tripped and the trans former is de energized The protective relay is a component of an on load tap changer filled with in sulating fluid and its properties conform to the respective applicable version of IEC publication 60214 1 Diverter switch operations at rated switching capacity or at permissible over load will not ca...

Page 30: ...tion 2 Nameplate View from above Figure 11 RS 2001 Ex 1 Gasket 2 Potential tie in 3 Terminal box cover 4 Slotted head screw for potential tie in 5 OPERATION reset test button 6 Slotted head screw for protective cover 7 OFF test tripping test button 8 Protective conductor connection 9 Protective cover 10 Dummy plug 11 Connection terminal ...

Page 31: ...to a defined overpressure in the oil compartment of the on load tap changer 3 2 4 3 Temperature monitoring The temperature monitoring system monitors the temperature of the insulat ing fluid in the oil compartment of the on load tap changer 3 3 Drive shaft 3 3 1 Function description The drive shaft is the mechanical connection between the drive and the on load tap changer head The bevel gear chang...

Page 32: ...VACUTAP VM Ex The explosion proof drive shaft consists of a square tube with insulator and is coupled by two coupling brackets and one coupling bolt at both ends to the drive or driven shaft end of the device to be connected Figure 13 Explosion proof drive shaft with insulator ...

Page 33: ...l The design of the explosion proof drive shaft is described in this section Figure 14 Components of the explosion proof drive shaft 1 Bevel gear 2 Hose clip 3 Screws 4 Telescopic protective tube 5 Coupling bracket 6 Insulator 7 Double coupling bracket 8 Square tube 9 Pin 10 Adapter ring 11 Protective cover ...

Page 34: ...iguration V 1 min Intermediate bearing Middle of hand crank middle of bevel gear maximum permissible axial offset 2 706 mm If the maximum value of 2472 mm is exceeded the use of an intermediate bearing is necessary V 1 2472 mm without in termediate bearing V 1 2472 mm with inter mediate bearing ...

Page 35: ...scription Maschinenfabrik Reinhausen GmbH 2020 35 5293079 01 EN VACUTAP VM Ex 3 3 3 Identification plate The identification plate is on the telescopic protective tube Figure 15 Position of the identification plate ...

Page 36: ... marking on the packaging states if for example the on load tap changer or selector has been packed upright Never stack these crates General rule Do not stack crates above a height of 1 5 m For other crates Only stack up to 2 equally sized crates on top of one an other The packaging is suitable to ensure undamaged and fully functional means of transportation in compliance with local transportation...

Page 37: ...allet secure it sufficiently Only trained and authorized persons may select the sling gear and se cure the load Do not walk under the suspended load Use means of transport and lifting gear with a sufficient carrying capacity in accordance with the weight stated on the delivery slip In addition to oscillation stress jolts must also be expected during trans portation In order to prevent possible dam...

Page 38: ...kaging is damaged do not under any circumstances install or commission the packaged goods Either re dry the dried packaged goods as per the operating instructions or contact the manufacturer to agree on how to proceed Identify the damaged parts Hidden damage When damages are not determined until unpacking after receipt of the ship ment hidden damage proceed as follows Make the party responsible fo...

Page 39: ...ackaging to lose its sealing function If the product is installed more than 6 months after delivery suitable mea sures must be taken without delay The following measures can be used Correctly regenerate the drying agent and restore the sealed packaging Unpack the packed goods and store in a suitable storage space well ven tilated as dust free as possible humidity 50 where possible 4 4 Unpacking sh...

Page 40: ...o not reach into the selector change over selector or potential connec tion unit during tap change operations Do not switch the on load tap changer during work on the selector change over selector or potential connection unit 5 1 Installation information Note the following information for the installation 1 Use the lifting straps provided to unpack and for transport by crane 2 During installation ...

Page 41: ...transformer 5 2 1 Fitting mounting flange on transformer cover A mounting flange is required for fitting the on load tap changer head on the transformer cover This can be supplied as an option or can be produced by the customer Mounting flanges made by the customer must comply with the installation drawings in the appendix NOTICE Fit mounting flange on transformer cover pressure tight En sure that...

Page 42: ...nsformer standard version 5 3 1 Fastening on load tap changer to transformer cover 5 3 1 1 Fastening oil compartment on transformer cover 1 CAUTION An unstably positioned oil compartment may tip over re sulting in injuries or property damage Place the oil compartment on a level surface and secure it against tipping 2 Remove red colored packaging material and transport material from the oil compart...

Page 43: ... mounting flange and on load tap changer head Figure 18 Sealing surfaces gasket 4 NOTICE Lowering the oil compartment without due care can result in the oil compartment colliding with the transformer cover and becoming dam aged Lift the oil compartment by hooking up the on load tap changer head and carefully lower it vertically into the opening of the transformer cover Figure 19 Lowering oil compa...

Page 44: ...th mounting flange 7 Remove the blocking strip from the coupling of the oil compartment base Figure 21 Blocking strip 5 3 1 2 Fastening tap selector on oil compartment of diverter switch not for VACUTAP VM 300 1 CAUTION Place the selector on a level surface and secure it against tipping An unstably positioned selector may tip resulting in severe in juries and property damage ...

Page 45: ...moved the selector coupling may no longer be turned Figure 23 Selector coupling with blocking strip 4 Place the selector on the lifting device The weight of the selector is a maximum of 165 kg 5 NOTICE Carefully lift selector below the oil compartment ensuring that the tap selector connecting leads are free when lifting the selector on the oil compartment and do not touch the compartment Failure t...

Page 46: ... shown in the adjustment plans supplied 7 Screw selector bracket onto oil compartment Figure 24 Oil compartment and selector screwed down 8 Screw tap selector connecting leads to connecting piece with care Comply with specified tightening torque and secure screw connection Failure to do so may result in damage to the on load tap changer and transformer Figure 25 Screwing on the tap selector connec...

Page 47: ...9 01 EN VACUTAP VM Ex 9 Fit screening caps to screw connections and fold up brackets on hexagon screws The screening caps differ depending on insulation to ground Figure 26 Screening caps on screw connection 10 Remove red supports on selector base if present ...

Page 48: ...e tap selector connecting leads 1 Screw tap selector connecting leads to connecting piece with care Comply with specified tightening torque and secure screw connection Failure to do so may result in damage to the on load tap changer and transformer Figure 27 Screwing on the tap selector connecting leads 1 Hexagon screw 4 Tap selector connecting lead 2 Screening cap 5 Connecting piece 3 Washer ...

Page 49: ...hausen GmbH 2020 49 5293079 01 EN VACUTAP VM Ex 2 Fit screening caps to screw connections and fold up brackets on hexagon screws The screening caps differ depending on insulation to ground Figure 28 Screening caps on screw connection ...

Page 50: ...e it against tipping An unstably positioned on load tap changer may tip re sulting in serious injuries or damage 2 CAUTION Prior to installation remove the red colored packaging and transport material from the on load tap changer 3 Clean sealing surfaces on mounting flange and on load tap changer head place oil resistant gasket on mounting flange Figure 29 Sealing surfaces oil resistant gasket ...

Page 51: ...TAP VM Ex 4 Remove the connecting leads on an on load tap changer with potential connection unit or on load tap changer with 3W 2W 3G change over se lector to enable the on load tap changer to fit through the transformer cover opening Figure 30 Removing connecting leads ...

Page 52: ...oad tap changer head and carefully lower vertically into cover opening of trans former Otherwise the shielding rings on the oil compartment may be dam aged only if Vm 170 kV is present Figure 31 Lowering on load tap changer into transformer 6 Check that the on load tap changer head is mounted in the position speci fied by the design ...

Page 53: ...hanger with 3W 2W 3G change over selector Figure 33 Fitting connecting leads 5 3 3 Connecting the tap winding and on load tap changer take off lead NOTICE Damage to the on load tap changer Connecting leads that place mechanical strain on the on load tap changer will damage the on load tap changer Establish connections carefully Do not twist connection contacts Connect connecting leads without warp...

Page 54: ...with the delivery 5 3 3 1 Selector connection contacts for VACUTAP VM and VM 300 The selector connection contacts are indicated on the selector bars have crimped ends and a through hole for M10 screws M8 screws for VACUTAP VM 300 to allow the tap selector connecting leads to be con nected with cable shoes Figure 34 Selector connection contacts Figure 35 Selector connection contacts for VACUTAP VM ...

Page 55: ...p winding connecting leads situated too closely to the change over selec tor s moving parts block the change over selector and therefore result in damage to the on load tap changer Tap winding connecting leads in the area of the change over selector have to be routed such that they are at a sufficient distance from the change over selector s moving parts In the case of multiple coarse change over ...

Page 56: ... in the area of the change over selector have to be routed such that they are at a sufficient distance from the change over selector s moving parts The and change over selector connection contacts are designed as connecting lugs with through holes for M10 screws for reversing change over selector connection The connection contact K is designed as an extended tap selector connec tion contact with t...

Page 57: ... contacts for reversing change over selector con nection Figure 39 Change over selector connection contacts for reversing change over selector con nection top view 5 3 3 4 Change over selector connection contacts for reversing change over selector connection VACUTAP VM 300 The and change over selector connection contacts are designed as connecting lugs with through holes for M8 screws for reversin...

Page 58: ...ult in damage to the on load tap changer Tap winding connecting leads in the area of the change over selector have to be routed such that they are at a sufficient distance from the change over selector s moving parts 5 3 3 5 Change over selector connection contacts for coarse tap selector connection NOTICE Damage to the on load tap changer Tap winding connecting leads situated too closely to the c...

Page 59: ...ange over selector in accordance with the connection diagram provided The cable shoes and fastening materials are not included in the scope of delivery 2 Take suitable measures to ensure that each fitting cannot come loose or settle e g by using clamping washers Be sure to attach the screening caps if these are included in the delivery scope 3 Close the screening caps and make sure they are seated...

Page 60: ...5 Mounting Maschinenfabrik Reinhausen GmbH 2020 60 5293079 01 EN VACUTAP VM Ex Figure 42 Change over selector connection contacts for coarse tap selector connection top view ...

Page 61: ...p selector connection VACUTAP VM 300 NOTICE Damage to the on load tap changer Tap winding connecting leads situated too closely to the change over selec tor s moving parts block the change over selector and therefore result in damage to the on load tap changer Tap winding connecting leads in the area of the change over selector have to be routed such that they are at a sufficient distance from the...

Page 62: ... off ring 1 Connect the on load tap changer take off lead to 1 of the 3 through holes on the take off ring using a cable shoe and screw The cable shoe and fastening materials are not included in the scope of delivery 2 Pay attention to the screw length A minimum distance of 2 mm must be maintained between screw and oil compartment Figure 45 Connecting ring of oil compartment 3 Take suitable measur...

Page 63: ...e indicated in the connection diagram supplied with the delivery For multiple column applications with a shared drive link all on load tap changer heads to one another using the horizontal drive shaft parts When actuating the change over selector a higher torque is required 1 Switch the on load tap changer into the desired operating position The di verter switch operation can be heard distinctly 2...

Page 64: ... in the oil compartment reduces the dielectric strength of the insu lating fluid and thus leads to damage to the on load tap changer Within 10 hours of drying seal off oil compartment with on load tap changer head cover Dry on load tap changer in accordance with the following instructions to en sure the dielectric values assured by MR for the on load tap changer If drying in an autoclave the follo...

Page 65: ... drain plug in the oil compartment base before drying so that the kerosene conden sate can drain from the oil compartment 1 Unscrew kerosene drain plug in base of oil compartment counter clock wise The kerosene drain plug cannot be unscrewed all the way Figure 46 Kerosene drain plug 2 NOTICE Remove the on load tap changer head cover 24 screws M10 wrench size 17 with locking washers and store it ou...

Page 66: ...load tap changer in accordance with the following instructions to en sure the dielectric values assured by MR on the on load tap changer If you want to dry the on load tap changer in the transformer tank fully as semble the transformer first and then undertake drying If drying in the transformer tank the following methods are possible Vacuum drying Vapor phase drying As an alternative to drying th...

Page 67: ...n begin the drying Section 5 3 7 2 4 Page 78 right away Otherwise you first have to open the kerosene drain plug before you can be gin the drying 5 3 7 2 1 Removing diverter switch insert 5 3 7 2 1 1 Moving on load tap changer to adjustment position Move the on load tap changer to the adjustment position The adjustment position is indicated in the on load tap changer connection diagram in cluded i...

Page 68: ...nspection window is sealed off with cover 2 Loosen screws with locking elements on on load tap changer head cover Figure 48 On load tap changer head cover 3 NOTICE Remove the on load tap changer head cover Make sure that sealing surfaces on the on load tap changer head cover and on load tap changer head are in sound condition when removing and during all other work and that the o ring is also unda...

Page 69: ... shaft end and remove tap position indicator disk Figure 50 Tap position indicator disk 5 3 7 2 1 4 Removing tap position indicator disk with multiple coarse change over selector with more than 35 operating positions 1 Ensure that the red marks on the panel tap position indicator disk and cover disk produce a continuous red line 2 Remove countersunk head screw Figure 51 Countersunk head screw ...

Page 70: ...EN VACUTAP VM Ex 3 Lever cover disk off underlying disk with flat screwdriver and pull out posi tion indication disk from between panel and bracket Figure 52 Cover disk and position indication disk 4 Remove hexagon screws and associated lock tab Figure 53 Lock tab ...

Page 71: ...ACUTAP VM Ex 5 Pull panel and bracket up and off indicator drive shaft Figure 54 Panel 5 3 7 2 1 5 Lifting out diverter switch insert 1 Remove attachment and locking elements on carrier plate of diverter switch insert Figure 55 Carrier plate of diverter switch insert ...

Page 72: ...ly and vertically Figure 57 Lifting out diverter switch insert 4 CAUTION An unstably positioned diverter switch insert may tip re sulting in injuries and property damage Place the diverter switch insert on a level surface and secure it against tipping 5 Note down whether the diverter switch insert is in the final end position on side A or side B The vacuum interrupter is closed on the side that is...

Page 73: ...Unscrew kerosene drain plug with extended socket wrench counter clockwise until it starts to become hard to open Figure 58 Kerosene drain plug 5 3 7 2 3 Inserting diverter switch insert 5 3 7 2 3 1 Inserting diverter switch insert 1 To fit diverter switch insert ensure that selector coupling and indication gear are in the adjustment position Figure 59 Adjustment position ...

Page 74: ... as when it was removed side A or side B The vacuum interrupter is closed on the side that is in the final end position In the example in the appendix side B is in the final end position see appendix 4 By turning the coupling tube align it in such a manner that the red trian gles on the coupling tube and carrier plate match up Figure 61 Coupling tube 5 NOTICE Mixing up the diverter switch inserts ...

Page 75: ...gure 62 Aligning diverter switch insert 7 Ensure correct position of carrier plate in on load tap changer head Area marked red must remain free 8 Secure carrier plate of diverter switch insert with screws for standard transformer version or nuts for bell type tank transformer version and safety elements Figure 63 Carrier plate of diverter switch insert for standard transformer version Figure 64 Ca...

Page 76: ... only be installed when in the correct position Place tap position indicator disk on indicator drive shaft slide spring clip on to shaft end Figure 65 Tap position indicator disk 5 3 7 2 3 3 Inserting tap position indicator with multiple coarse change over selector with more than 35 operating positions 1 Place panel with bracket on indicator drive shaft and fasten with hexagon screws and associate...

Page 77: ...racket and fit cover disk Align tap position indicator disc and cover disk to produce a continuous red line Figure 67 Inserting position indication disk 3 Secure cover disk with countersunk head screw The countersunk head screw must be suitable for center punching Figure 68 Fastening cover disk 4 Secure countersunk head screw by center punching ...

Page 78: ... leads to oil escaping and there fore to damage of the on load tap changer Also ensure that the red trian gular marks on the on load tap changer head and the on load tap changer head cover match up Figure 69 On load tap changer head cover with o ring 2 Screw on load tap changer head cover using screws and washers Figure 70 On load tap changer head cover 5 3 7 2 4 Drying the on load tap changer 1 C...

Page 79: ...ug NOTICE Damage to the on load tap changer Moisture in the oil compartment reduces the dielectric strength of the insu lating fluid and thus leads to damage to the on load tap changer Within 10 hours of drying seal off oil compartment with on load tap changer head cover 1 Remove Section 5 3 7 2 1 Page 67 the diverter switch insert 2 NOTICE An open kerosene drain plug leads to insulating fluid esc...

Page 80: ...ved by the transformer manufacturer you can use synthetic es ters in accordance with IEC 61099 approved by Maschinenfabrik Rein hausen GmbH After drying completely fill the oil compartment diverter switch insert fitted with oil again as soon as possible so that an impermissible amount of humid ity is not absorbed from the surroundings 1 Establish a connecting lead between pipe connection E2 and on...

Page 81: ...l compartment of the on load tap changer is completely filled with insulating fluid Only switch the on load tap changer from one operating position to the next via the upper gear unit You can use a short tube diameter 25 mm with screwed in coupling bolt diameter 12 mm with a hand wheel or crank for this for example When using a drill do not exceed a maximum speed of 250 rpm Always check the operat...

Page 82: ...same direction in order to correctly complete the tap change operation 3 Perform the transformer ratio test 4 Repeat the transformer ratio test in all operating positions 5 Switch the on load tap changer into adjustment position see the accom panying connection diagram for the on load tap changer 5 4 Installing on load tap changer in transformer bell type tank version 5 4 1 Inserting on load tap c...

Page 83: ...elector coupling Once the blocking strip is removed the selector coupling may no longer be turned Figure 75 Selector coupling with blocking strip 4 CAUTION Place the oil compartment on a level surface and secure it against tipping An unstably positioned oil compartment may tip over re sulting in severe injuries or property damage 5 CAUTION Prior to installation remove the red colored packaging and...

Page 84: ...mpartment vertically and align the position of both coupling parts and attachment points of the oil compartment and se lector with one another The correct position of the two coupling parts is shown in the adjustment plans supplied 9 Screw selector bracket onto oil compartment Figure 77 Selector with oil compartment 10 NOTICE Screw tap selector connecting leads to connecting piece with care Comply...

Page 85: ...020 85 5293079 01 EN VACUTAP VM Ex 11 Screw tap selector connecting leads to the connecting pieces Figure 78 Screwing on the tap selector connecting leads 1 Hexagon screw 4 Tap selector connecting lead 2 Screening cap 5 Connecting piece 3 Washer ...

Page 86: ...ausen GmbH 2020 86 5293079 01 EN VACUTAP VM Ex 12 Fit screening caps to screw connections and fold up brackets on hexagon screws The screening caps differ depending on insulation to ground Figure 79 Screening caps on screw connection ...

Page 87: ...OTICE Screw tap selector connecting leads to connecting piece with care Comply with specified tightening torque and secure screw connec tion Failure to do so may result in damage to the on load tap changer and transformer 2 Screw tap selector connecting leads to the connecting pieces Figure 80 Screwing on the tap selector connecting leads 1 Hexagon screw 4 Tap selector connecting lead 2 Screening ...

Page 88: ...hausen GmbH 2020 88 5293079 01 EN VACUTAP VM Ex 3 Fit screening caps to screw connections and fold up brackets on hexagon screws The screening caps differ depending on insulation to ground Figure 81 Screening caps on screw connection ...

Page 89: ...ructure maximum 1 deviation from the vertical so that the on load tap changer reaches its final installation height and only has to be raised a maximum of 5 20 mm once the tap winding and the on load tap changer take off lead have been connected and the bell type tank fitted Figure 82 On load tap changer with spacers on supporting structure 2 Temporarily fasten on load tap changer to supporting st...

Page 90: ...tor s pitch of tap selector contact circle is stated in the on load tap changer s type designation after the selector size Example M I 501 123 B 36340 B selector size 36 pitch of tap selector contact circle 5 4 2 Connecting the tap winding and on load tap changer take off lead NOTICE Damage to the on load tap changer Connecting leads that place mechanical strain on the on load tap changer will dam...

Page 91: ...with the delivery 5 4 2 1 Selector connection contacts for VACUTAP VM and VM 300 The selector connection contacts are indicated on the selector bars have crimped ends and a through hole for M10 screws M8 screws for VACUTAP VM 300 to allow the tap selector connecting leads to be con nected with cable shoes Figure 85 Selector connection contacts Figure 86 Selector connection contacts for VACUTAP VM ...

Page 92: ...p winding connecting leads situated too closely to the change over selec tor s moving parts block the change over selector and therefore result in damage to the on load tap changer Tap winding connecting leads in the area of the change over selector have to be routed such that they are at a sufficient distance from the change over selector s moving parts In the case of multiple coarse change over ...

Page 93: ... in the area of the change over selector have to be routed such that they are at a sufficient distance from the change over selector s moving parts The and change over selector connection contacts are designed as connecting lugs with through holes for M10 screws for reversing change over selector connection The connection contact K is designed as an extended tap selector connec tion contact with t...

Page 94: ... contacts for reversing change over selector con nection Figure 90 Change over selector connection contacts for reversing change over selector con nection top view 5 4 2 4 Change over selector connection contacts for reversing change over selector connection VACUTAP VM 300 The and change over selector connection contacts are designed as connecting lugs with through holes for M8 screws for reversin...

Page 95: ...ult in damage to the on load tap changer Tap winding connecting leads in the area of the change over selector have to be routed such that they are at a sufficient distance from the change over selector s moving parts 5 4 2 5 Change over selector connection contacts for coarse tap selector connection NOTICE Damage to the on load tap changer Tap winding connecting leads situated too closely to the c...

Page 96: ...ange over selector in accordance with the connection diagram provided The cable shoes and fastening materials are not included in the scope of delivery 2 Take suitable measures to ensure that each fitting cannot come loose or settle e g by using clamping washers Be sure to attach the screening caps if these are included in the delivery scope 3 Close the screening caps and make sure they are seated...

Page 97: ...5 Mounting Maschinenfabrik Reinhausen GmbH 2020 97 5293079 01 EN VACUTAP VM Ex Figure 93 Change over selector connection contacts for coarse tap selector connection top view ...

Page 98: ...p selector connection VACUTAP VM 300 NOTICE Damage to the on load tap changer Tap winding connecting leads situated too closely to the change over selec tor s moving parts block the change over selector and therefore result in damage to the on load tap changer Tap winding connecting leads in the area of the change over selector have to be routed such that they are at a sufficient distance from the...

Page 99: ... off ring 1 Connect the on load tap changer take off lead to 1 of the 3 through holes on the take off ring using a cable shoe and screw The cable shoe and fastening materials are not included in the scope of delivery 2 Pay attention to the screw length A minimum distance of 2 mm must be maintained between screw and oil compartment Figure 96 Connecting ring of oil compartment 3 Take suitable measur...

Page 100: ...re indicated in the connection diagram supplied with the delivery For multiple column applications with a shared drive link all on load tap changer heads to one another using the horizontal drive shaft parts When actuating the change over selector a higher torque is required 1 Switch the on load tap changer into the desired operating position The di verter switch operation can be heard distinctly ...

Page 101: ... in the oil compartment reduces the dielectric strength of the insu lating fluid and thus leads to damage to the on load tap changer Within 10 hours of drying seal off oil compartment with on load tap changer head cover Dry on load tap changer in accordance with the following instructions to en sure the dielectric values assured by MR for the on load tap changer If drying in an autoclave the follo...

Page 102: ...e drain plug in the oil compartment base before drying so that the kerosene conden sate can drain from the oil compartment 1 Unscrew kerosene drain plug in base of oil compartment counter clock wise The kerosene drain plug cannot be unscrewed all the way Figure 97 Kerosene drain plug 2 NOTICE Remove the on load tap changer head cover 24 screws M10 wrench size 17 with locking washers and store it o...

Page 103: ...NG Danger of explosion Danger of death from explosive gases under the on load tap changer head cover Ensure that there are no open flames hot surfaces or sparks for exam ple caused by static charging in the immediate surroundings and that none arise De energize all auxiliary circuits for example tap change supervisory de vice before removing the on load tap changer head cover Do not operate any el...

Page 104: ...head cover Figure 99 On load tap changer head cover 4 NOTICE Remove the on load tap changer head cover Make sure that sealing surfaces on the on load tap changer head cover and on load tap changer head are in sound condition when removing and during all other work and that the o ring is also undamaged Damaged sealing surfaces lead to oil escaping and therefore to on load tap changer and transforme...

Page 105: ...shaft end and remove tap position indicator disk Figure 101 Tap position indicator disk 5 4 6 3 Removing tap position indicator disk with multiple coarse change over selector with more than 35 operating positions 1 Ensure that the red marks on the panel tap position indicator disk and cover disk produce a continuous red line 2 Remove countersunk head screw Figure 102 Countersunk head screw ...

Page 106: ...N VACUTAP VM Ex 3 Lever cover disk off underlying disk with flat screwdriver and pull out posi tion indication disk from between panel and bracket Figure 103 Cover disk and position indication disk 4 Remove hexagon screws and associated lock tab Figure 104 Lock tab ...

Page 107: ... VACUTAP VM Ex 5 Pull panel and bracket up and off indicator drive shaft Figure 105 Panel 5 4 6 4 Lifting out diverter switch insert 1 Remove attachment and locking elements on carrier plate of diverter switch insert Figure 106 Carrier plate of diverter switch insert ...

Page 108: ...t diverter switch insert 4 CAUTION An unstably positioned diverter switch insert may tip re sulting in injuries and property damage Place the diverter switch insert on a level surface and secure it against tipping 5 Note down whether the diverter switch insert is in the final end position on side A or side B If the diverter switch insert is in the final end position on side A the vacuum interrupte...

Page 109: ...ing piece of the oil suction pipe in the on load tap changer head inwards and out Pay attention to the O ring Figure 109 Oil suction pipe 5 4 6 6 Lifting on load tap changer head off supporting flange 1 Remove nuts and safety elements between on load tap changer head and supporting flange Figure 110 On load tap changer head with nuts ...

Page 110: ...5 Mounting Maschinenfabrik Reinhausen GmbH 2020 110 5293079 01 EN VACUTAP VM Ex 2 Lift off the on load tap changer head from the supporting flange Figure 111 On load tap changer head ...

Page 111: ...necting the on load tap changer to the top part of the on load tap changer head 5 4 7 1 Attaching bell type tank 1 Clean sealing surface of supporting flange place o ring on supporting flange Figure 112 Supporting flange with o ring 2 Lift the bell type tank over the active part of the transformer Figure 113 Bell type tank ...

Page 112: ...anger head on bell type tank 1 NOTICE Unsuitable gaskets may lead to oil escaping and therefore to damage to the on load tap changer Place a gasket suitable for the in sulating fluid used on the mounting flange Clean the sealing surfaces on the mounting flange and on load tap changer head Figure 114 Mounting flange with gasket ...

Page 113: ... VACUTAP VM Ex 2 Lower and position the top part of the on load tap changer head on mounting flange so that the triangular markings pins and mounting holes on the top part and bottom part of the on load tap changer head are aligned Figure 115 Markings and fitted bolt ...

Page 114: ...onnection screws of the supporting flange are used to lift the on load tap changer the screws may be damaged which makes it impossible to properly screw the on load tap changer and the on load tap changer head together Always lift the on load tap changer with the specified lifting traverse and never with the connection screws of the supporting flange 1 Insert lifting traverse in on load tap change...

Page 115: ... load tap changer with lifting traverse and ensure that the triangular markings are aligned and that all supporting flange stud bolts go easily through the mounting holes of the on load tap changer head Figure 117 Lifting on load tap changer 3 Screw the top part and bottom part of the on load tap changer head to gether in the area marked in red Figure 118 Screwing the on load tap changer head onto...

Page 116: ...4 Remove lifting traverse Figure 119 Removing lifting traverse 5 Screw the on load tap changer head to the mounting flange Figure 120 Screwing the on load tap changer head to the mounting flange 5 4 7 4 Inserting oil suction pipe 1 Lightly grease the O rings of the oil suction pipe ...

Page 117: ...uction pipe into the on load tap changer head Make sure the O rings are correctly fitted Figure 121 Oil suction pipe 5 4 7 5 Inserting diverter switch insert 1 To fit diverter switch insert ensure that selector coupling and indicator gear are in the adjustment position Figure 122 Adjustment position ...

Page 118: ...n carrier plate 3 Ensure that diverter switch insert is in the final end position on the same side as when it was removed side A or side B The vacuum interrupter is closed on the side that is in the final end position In the example in the appendix side B is in the final end position see appendix 4 By turning the coupling tube align it in such a manner that the red trian gles on the coupling tube ...

Page 119: ...6 Align diverter switch insert such that the red triangles at the top of the en ergy accumulator and on the on load tap changer head are opposite one another Slowly lower diverter switch insert Figure 125 Aligning diverter switch insert 7 Slowly lower diverter switch insert 8 Ensure correct position of carrier plate in on load tap changer head Area marked red must remain free 9 Secure carrier plat...

Page 120: ...only be installed when in the correct position Place tap position indicator disk on indicator drive shaft slide spring clip on to shaft end Figure 127 Tap position indicator disk 5 4 7 7 Inserting tap position indicator with multiple coarse change over selector with more than 35 operating positions 1 Place panel with bracket on indicator drive shaft and fasten with hexagon screws and associated lo...

Page 121: ...racket and fit cover disk Align tap position indicator disc and cover disk to produce a continuous red line Figure 129 Inserting position indication disk 3 Secure cover disk with countersunk head screw The countersunk head screw must be suitable for center punching Figure 130 Fastening cover disk 4 Secure countersunk head screw by center punching ...

Page 122: ... Figure 131 On load tap changer head cover with o ring 2 Screw on load tap changer head cover using screws and washers Figure 132 On load tap changer head cover 5 4 8 Drying on load tap changer in transformer tank Dry on load tap changer in accordance with the following instructions to en sure the dielectric values assured by MR on the on load tap changer If you want to dry the on load tap changer...

Page 123: ... C h to a final temperature of maximum 110 C 2 Pre dry the on load tap changer in circulating air at a maximum tempera ture of 110 C for a period of at least 20 hours 3 Vacuum dry on load tap changer at between 105 C and maximum 125 C for at least 50 hours 4 Residual pressure of no more than 10 3 bar If you wish to perform another transformer ratio test after drying proceed as described in the sec...

Page 124: ... immediate surroundings and that none arise De energize all auxiliary circuits for example tap change supervisory de vice before removing the on load tap changer head cover Do not operate any electrical devices during the work for example risk of sparks caused by impact wrench Only use conductive and grounded hoses pipes and pump equipment that are approved for flammable liquids NOTICE Damage to t...

Page 125: ...to oil escaping and therefore to on load tap changer and transformer damage Figure 135 On load tap changer head cover 5 4 8 2 1 3 Removing tap position indicator disk without multiple coarse change over selector Pull spring clip off shaft end and remove tap position indicator disk Figure 136 Tap position indicator disk 5 4 8 2 1 4 Removing tap position indicator disk with multiple coarse change ov...

Page 126: ...EN VACUTAP VM Ex 2 Remove countersunk head screw Figure 137 Countersunk head screw 3 Lever cover disk off underlying disk with flat screwdriver and pull out posi tion indication disk from between panel and bracket Figure 138 Cover disk and position indication disk ...

Page 127: ...2 1 5 Lifting out diverter switch insert 1 NOTICE Loosen nuts and locking elements on carrier plate of diverter switch insert Make sure that parts do not fall into the oil compartment Parts in the oil compartment may block the diverter switch insert thereby damaging the on load tap changer and transformer Check that you have the same number of parts when removing and installing Figure 141 Carrier ...

Page 128: ...ainst tipping An unstably positioned diverter switch insert may tip resulting in injuries and property damage 5 Note down whether the diverter switch insert is in the final end position on side A or side B If the diverter switch insert is in the final end position on side A the vacuum interrupter on side A is closed and vice versa In the example in the appendix the diverter switch insert is in the...

Page 129: ...TAP VM Ex Figure 144 Kerosene drain plug 5 4 8 2 3 Inserting diverter switch insert 5 4 8 2 3 1 Inserting diverter switch insert 1 To fit diverter switch insert ensure that selector coupling and indication gear are in the adjustment position Figure 145 Adjustment position ...

Page 130: ... as when it was removed side A or side B The vacuum interrupter is closed on the side that is in the final end position In the example in the appendix side B is in the final end position see appendix 4 By turning the coupling tube align it in such a manner that the red trian gles on the coupling tube and carrier plate match up Figure 147 Coupling tube 5 NOTICE Mixing up the diverter switch inserts...

Page 131: ...ure 148 Aligning diverter switch insert 7 Ensure correct position of carrier plate in on load tap changer head Area marked red must remain free 8 Secure carrier plate of diverter switch insert with screws for standard transformer version or nuts for bell type tank transformer version and safety elements Figure 149 Carrier plate of diverter switch insert for standard transformer version Figure 150 ...

Page 132: ...only be installed when in the correct position Place tap position indicator disk on indicator drive shaft slide spring clip on to shaft end Figure 151 Tap position indicator disk 5 4 8 2 3 3 Inserting tap position indicator with multiple coarse change over selector with more than 35 operating positions 1 Place panel with bracket on indicator drive shaft and fasten with hexagon screws and associate...

Page 133: ...racket and fit cover disk Align tap position indicator disc and cover disk to produce a continuous red line Figure 153 Inserting position indication disk 3 Secure cover disk with countersunk head screw The countersunk head screw must be suitable for center punching Figure 154 Fastening cover disk 4 Secure countersunk head screw by center punching ...

Page 134: ... leads to oil escaping and there fore to damage of the on load tap changer Also ensure that the red trian gular marks on the on load tap changer head and the on load tap changer head cover match up Figure 155 On load tap changer head cover with o ring 2 Screw on load tap changer head cover using screws and washers Figure 156 On load tap changer head cover 5 4 8 2 4 Drying the on load tap changer 1...

Page 135: ...g NOTICE Damage to the on load tap changer Moisture in the oil compartment reduces the dielectric strength of the insu lating fluid and thus leads to damage to the on load tap changer Within 10 hours of drying seal off oil compartment with on load tap changer head cover 1 Remove Section 5 4 8 2 1 Page 124 the diverter switch insert 2 NOTICE An open kerosene drain plug leads to insulating fluid esc...

Page 136: ...ved by the transformer manufacturer you can use synthetic es ters in accordance with IEC 61099 approved by Maschinenfabrik Rein hausen GmbH After drying completely fill the oil compartment diverter switch insert fitted with oil again as soon as possible so that an impermissible amount of humid ity is not absorbed from the surroundings 1 Establish a connecting lead between pipe connection E2 and on...

Page 137: ...il compartment of the on load tap changer is completely filled with insulating fluid Only switch the on load tap changer from one operating position to the next via the upper gear unit You can use a short tube diameter 25 mm with screwed in coupling bolt diameter 12 mm with a hand wheel or crank for this for example When using a drill do not exceed a maximum speed of 250 rpm Always check the opera...

Page 138: ...rically connecting the temperature sensor Size the cable for the electrical connection of the temperature sensors such that you can turn the sensors if necessary when mounting the drive shaft Electrically connect the temperature sensors in accordance with the con nection diagram provided 5 5 2 Installing protective relay in piping and connecting WARNING Danger of explosion Explosive gases in the p...

Page 139: ...n selecting the cir cuit breaker type All circuits and suitable equipment such as isolating de vices must satisfy the requirements on explosion protection applicable in the respective potentially explosive area In addition observe the following It must be easy for the operator to access the isolating device The isolating device must be labeled for the device and the circuits to be isolated The iso...

Page 140: ...act positions for checking electrical continuity are shown in the dimen sional drawing provided 1 Loosen the three screws on the terminal box cover and lift off the terminal box cover Figure 160 Terminal box cover 2 Remove the slotted head screw for potential tie in and remove the termi nal box cover with wire Figure 161 Terminal box cover NOTICE Damage to protective relay Damage to protective rel...

Page 141: ...9 01 EN VACUTAP VM Ex 3 Press OFF test button ð Flap valve is inclined The red indicator is not visible Figure 162 OFF position 4 Press OPERATION test button ð Flap valve is vertical The red indicator appears in the viewing window Figure 163 OPERATION position ...

Page 142: ...ver 5 5 2 3 Installing protective relay in piping Ensure the following for installation and proper function of the protective re lay 1 Ensure that there are no foreign bodies in the piping or in the oil conserva tor 2 Install protective relay such that it can be easily accessed for subsequent maintenance work 3 Install protective relay with good support and free from vibrations 4 The test buttons ...

Page 143: ...elay to the oil conservator must be routed with an inclination of at least 2 1 2 to ensure the switching gases can escape freely 8 The protective relay is intended for a horizontal operating position in close proximity to the on load tap changer head A positive inclination of up to 5 from the horizontal is permitted in the direction toward the conservator An inclination of up to 5 from the vertica...

Page 144: ...n GmbH 2020 144 5293079 01 EN VACUTAP VM Ex 9 The reference arrow on the terminal box cover must point toward the on load tap changer s oil conservator Figure 167 Reference arrow pointing towards the on load tap changer s oil conservator ...

Page 145: ...er an NC or NO contact in the following variants 2 x NC contact 2 x NO contact 1 x NC contact and 1x NO contact WARNING Risk of death or severe injury Risk of death or severe injury due to improper electrical connection of the protective relay Loop the protective relay into the tripping circuit of the circuit breakers of the transformer to be protected so that the transformer is immediately de ene...

Page 146: ... as follows 1 Connect protective conductor with cable cross section of 1 4 mm2 to cylinder head screw 2 Take off MR dummy plug Figure 169 Dummy plug 3 Insert explosion certified cable bushing into tapped hole on side of termi nal box 4 Loosen the three screws on the terminal box cover and lift off the terminal box cover Figure 170 Terminal box cover ...

Page 147: ...r the protective cover and take off the protective cover Figure 172 Terminal box cover and protective cover 7 Guide explosion certified cable through cable bushing and into protective relay Ensure that the cable gland is well connected and sealed 8 Connect electric cables with cable cross section of 1 4 mm2 to connec tion terminals in accordance with connection diagram 9 Insert the protective cove...

Page 148: ...g the slotted head screw Figure 173 Terminal box cover 11 Attach the terminal box cover and secure with screws Figure 174 Terminal box cover 5 5 3 Fitting motor drive unit Fit motor drive unit to transformer as described in relevant MR operating instructions for motor drive unit 5 5 4 Fitting drive shaft Observe the following during mounting ...

Page 149: ... of the drive and the on load tap changer or de ener gized tap changer cannot be guaranteed The shaft ends to be connected must be exactly aligned Permitted axial displacement Minor axial displacement can be tolerated as long as it does not exceed 35 mm per 1 000 mm square tube length that corresponds to 2 Figure 175 Permitted maximum axial displacement of vertical drive shaft ...

Page 150: ...ting square tubes telescopic protective tubes and protective cover The square tubes telescopic protective tubes and protective cover are sup plied in overlengths graded standard lengths You must cut these parts to the required size before mounting on the transformer In rare cases you also have to cut the inner tube of the telescopic protective tube to the desired length The maximum total drive sha...

Page 151: ...s 1 CAUTION Switch off motor protective switch Q1 in the motor drive unit position O If this is not done the motor drive unit may be started in advertently and cause injuries 2 Screw down the bevel gear for fastening on the transformer on both sides with the contact washers provided to ensure permanent grounding Screws are not included in the scope of supply Figure 177 Bevel gear ...

Page 152: ...en GmbH 2020 152 5293079 01 EN VACUTAP VM Ex 3 Determine dimension A between shaft end of drive and shaft end of bevel gear Shorten the square tube to length of A 179 mm taking the insulator into account Figure 178 Shortening square tube ...

Page 153: ...he cut surfaces on the square tube Figure 179 Deburring cut surfaces 5 Screw down the double coupling bracket with the insulator supplied and the square tube Mount the insulator on the side facing the drive Figure 180 Screwing down the square tube and the insulator with double coupling part ...

Page 154: ...til the stop is reached Figure 181 Sliding the coupling part onto the insulator 7 Insert the coupling bolt into the shaft end of the drive Grease the coupling part coupling bolt and shaft end e g ISOFLEX TOPAS L32 Slide the square tube with the coupling part onto the shaft end Figure 182 Sliding the square tube with the coupling part onto the shaft end ...

Page 155: ...183 Attaching the square tube to the drive 9 Pivot the square tube away from the axis Figure 184 Pivoting the square tube away from the axis 10 When installing the telescopic protective tube shorten the inner tube on the side without slots if necessary The minimum dimension for overlap ping the two protective tubes is 100 mm ...

Page 156: ...ed in order to slide easily in the outer tube Figure 185 Deburring the inner tube Dimension A distance between the shaft end of the drive and the shaft end of bevel gear Inner tube Outer tube 170 mm 190 mm Shorten to 200 mm 200 mm 191 mm 1130 mm Dimension A 20 mm 200 mm 1131 mm 1598 mm 700 mm 1150 mm 1 599 mm 2 009 mm 1150 mm 1 150 mm ...

Page 157: ... GmbH 2020 157 5293079 01 EN VACUTAP VM Ex 11 For the separate grounding with 110 mm spacing viewed from the slot ted side drill an 11 mm diameter hole in the inner tube Figure 186 Producing grounding hole on the telescopic protective tube ...

Page 158: ...e outer tube over the inner tube When doing so make sure that the non slotted side of the inner tube is facing upwards Slide the tele scopic protective tube onto the square tube Then slide the hose clips over the telescopic protective tube Figure 187 Sliding on the telescopic protective tube ...

Page 159: ...1 EN VACUTAP VM Ex 13 Place the adapter ring over the bearing collar of the bevel gear and slide upwards Insert the coupling bolt into the shaft end of the bevel gear Pivot the square tube back to the axis Figure 188 Fitting the adapter ring and the coupling bolt ...

Page 160: ...ease the coupling brackets coupling bolt and shaft end e g ISOFLEX TOPAS L32 and secure the square tube with the coupling brackets on the bevel gear Set a unilateral axial clearance of 3 mm between the coupling bolt and the upper coupling piece Figure 189 Mounting the coupling brackets ...

Page 161: ...lied screw with contact washers to establish a connection between the bottom protective tube inner tube and the functional ground Due to the risk of collision with the screw head fit the fixing screw for the grounding cable from the inside Figure 190 Screwing down the grounding cable on the telescopic protective tube ...

Page 162: ... Attach the bottom protective tube inner tube with a hose clip to the bearing collar of drive Then slide the upper protective tube outer tube over the adapter on the bevel gear Secure the upper protective tube to the second hose clip at top end Figure 191 Mounting the protective tube ...

Page 163: ...2 Fitting horizontal drive shaft with insulator Aligning upper gear unit on the on load tap changer head In order to correctly install the horizontal drive shaft under certain circum stances you may have to first align the upper gear unit such that the horizon tal drive shaft is flush with the shaft end of the upper gear unit To do so proceed as follows 1 NOTICE Damage to the on load tap changer d...

Page 164: ... segments 3 NOTICE Align gear unit such that the horizontal drive shaft is flush with the drive shaft of the gear unit While aligning the gear unit turn the unit s drive shaft such that its output shaft retains its original position Failure to do so may result in damage to the de energized tap changer and trans former when starting up Figure 194 Aligning gear unit ...

Page 165: ...nd that the pressure ring segments are firmly in contact with the gear unit housing Figure 195 Securing pressure ring segments Fitting the horizontal drive shaft To mount the horizontal drive shaft proceed as follows 1 Calculate dimension A between the shaft end of the upper gear unit and the shaft end of the bevel gear and shorten the square tube to length A 179 mm taking the insulator into accou...

Page 166: ...t down the protective cover to B 2 mm and deburr the cut edges Figure 197 Shortening and deburring the protective cover 3 For the separate grounding with 110 mm spacing from the bevel gear drill an 11 mm diameter hole in the protective cover Protect the protective cover against corrosion with a coat of paint Figure 198 Producing the grounding hole on the protective cover ...

Page 167: ...racket with the insulator supplied and the square tube Mount the insulator on the side facing the bevel gear Figure 199 Screwing down the square tube and the insulator with double coupling part 5 Slide the loosely screwed together coupling part onto the insulator until the stop is reached Figure 200 Coupling parts ...

Page 168: ...r e g ISOFLEX TOPAS L32 and insert the coupling bolt into shaft end Thread the hose clip onto the square tube and slide the square tube with the coupling part onto the shaft end Figure 201 Sliding the square tube with the coupling part onto the shaft end 7 Secure the square tube onto the bevel gear Figure 202 Securing the square tube on the bevel gear ...

Page 169: ... the shaft end of the upper gear unit e g ISOFLEX TOPAS L32 and insert the coupling bolt into the shaft end Secure the square tube with the coupling brackets on the upper gear unit Set a unilateral axial clearance of 3 mm between the coupling bolt and the upper coupling piece Figure 203 Secure the square tube on the upper gear unit ...

Page 170: ...2020 170 5293079 01 EN VACUTAP VM Ex 9 Attach the shortened protective cover to the housing lugs on the on load tap changer head and the bevel gear Secure each end of the protective cover with a hose clip Figure 204 Fitting the protective cover ...

Page 171: ...ap changer sets and combinations For two column and three column on load tap changer models the individ ual on load tap changer columns are driven by a common motor drive unit You must couple the on load tap changer heads above the transformer cover together and ensure synchronous switching of the on load tap changer columns Proceed as follows 1 Check that the operating positions of all on load ta...

Page 172: ... heads Individ ually couple each on load tap changer Start with the on load tap changer which is closest to the motor drive unit 9 NOTICE After installing all drive shafts continue cranking another 2 5 revolutions counter clockwise on the drive shaft of the upper gear unit to correctly complete the tap change operation An incomplete tap change operation may damage the on load tap changer 10 Switch...

Page 173: ...ve and grounded hoses pipes and pump equipment that are approved for flammable liquids WARNING Danger of explosion Overloading the on load tap changer can lead to explosion Spraying hot in sulating fluid and flying parts can lead to death and serious injuries Prop erty damage is highly probable Ensure that the on load tap changer is not overloaded Ensure use of the on load tap changer in accordanc...

Page 174: ...Ex 2 Remove screw cap on air vent valve E1 on the on load tap changer head cover Figure 206 Screw cap 3 Use screwdriver to lift valve tappet on air vent valve E1 and bleed on load tap changer head Figure 207 Valve tappet 4 Seal air vent valve E1 with screw cap tightening torque 10 Nm ...

Page 175: ... Figure 208 Screw cap 2 NOTICE An incompletely bled suction pipe significantly impairs the insu lation capability of the on load tap changer to ground Open vent screw and bleed suction pipe completely 3 Close vent screw 4 Seal vent screw with screw cap 6 1 2 Grounding the on load tap changer If necessary reduce the stated tightening torque according to the grounding line used ...

Page 176: ... the trans former s ground connection Figure 210 Grounding screw on motor drive unit 3 Connect housing of temperature sensor with grounding screw on on load tap changer head 6 1 3 Checking motor drive unit NOTICE Damage to the on load tap changer de energized tap changer Damage to the on load tap changer de energized tap changer due to actu ation of the on load tap changer de energized tap changer...

Page 177: ...ans former Ensure that the oil compartment of the on load tap changer is completely filled with insulating fluid Ensure that all protective devices for the on load tap changer are function ing correctly and are ready for use Ensure that the ground connections on the motor drive protective housing and protective housing fastening are free of paint Only perform high voltage test if motor drive unit ...

Page 178: ...and the on load tap changer are in the adjustment position 2 Remove the drive 3 Do not actuate the drive while the on load tap changer is uncoupled and do not turn the output shaft 4 Do not actuate an on load tap changer which is uncoupled and do not turn its drive shaft 5 Transport the drive to the installation site in the MR delivery packaging 6 Fit the drive Section 5 5 3 Page 148 and the drive...

Page 179: ...itoring device 2 With the stop cock slide valve between oil conservator and oil compart ment open open air vent valve E1 on the on load tap changer head 3 Discharge the gas from under the on load tap changer cover Ensure suf ficient fresh air e g in transformer cells and work tents when doing so 4 Once the gas has been discharged and the insulating fluid is flowing out of the air vent valve close ...

Page 180: ...d NOTICE Damage to the on load tap changer Unsuitable insulating fluids cause damage to the on load tap changer Use insulating fluids that meet the requirements in accordance with IEC 60296 If approved by the transformer manufacturer you can use synthetic es ters in accordance with IEC 61099 or natural esters in accordance with IEC 62770 approved by Maschinenfabrik Reinhausen GmbH 1 Establish a co...

Page 181: ... from the oil compartment 4 Record the temperature of the sample immediately after the sample is taken 5 Determine the dielectric strength and water content at a sample tempera ture of 20 C 5 C The dielectric strength and water content must comply with the limit values Section 8 3 Page 193 specified in the technical data 6 3 2 Bleeding on load tap changer head and suction pipe 6 3 2 1 Bleeding on ...

Page 182: ...Ex 2 Remove screw cap on air vent valve E1 on the on load tap changer head cover Figure 214 Screw cap 3 Use screwdriver to lift valve tappet on air vent valve E1 and bleed on load tap changer head Figure 215 Valve tappet 4 Seal air vent valve E1 with screw cap tightening torque 10 Nm ...

Page 183: ...ent screw and bleed suction pipe completely 3 Close vent screw 4 Seal vent screw with screw cap 6 3 3 Checking motor drive unit NOTICE Damage to the on load tap changer de energized tap changer Damage to the on load tap changer de energized tap changer due to actu ation of the on load tap changer de energized tap changer without insulat ing fluid Ensure that the selector de energized tap changer i...

Page 184: ...pled and that the motor drive unit functions correctly Tests on the motor drive unit 1 Perform function checks as described in relevant MR operating instruc tions for motor drive unit 2 NOTICE An incorrectly coupled motor drive unit will lead to damage to the on load tap changer Undertake trial tap change operations across the entire range of settings Ensure that in each operating position the tap...

Page 185: ...f the circuit breaker ü The protective relay and additional protective devices are looped into the circuit breaker s tripping circuit ü The motor drive unit and all protective devices are functioning correctly and are ready for use ü The oil compartment of the on load tap changer is completely filled with insulation fluid ü All stop cocks between on load tap changer and oil conservator of the on l...

Page 186: ... when protective relay or other protective devices have been tripped Do not use the equipment again until you are sure there is no damage to the on load tap changer or transformer NOTICE Damage to motor drive unit Damage to the motor drive unit due to condensate in protective housing of motor drive unit Always keep protective housing of the motor drive unit tightly closed In the event of operation...

Page 187: ...nger not changing tap position sluggish ness Raise keys Lower keys not working no audible di verter switch action Contact MR No change in voltage on transformer despite change in po sition on motor drive unit Contact MR Tap position indicator on motor drive unit and on load tap changer different Contact MR Noises on drive shaft or motor drive unit when changing tap position Ensure proper mounting ...

Page 188: ...sted Be sure to contact Maschinenfabrik Reinhausen to check on load tap changer and transformer if the protective relay has tripped Only use the equipment again when you are sure there is no damage to the on load tap changer or transformer When the circuit breakers have been tripped by the protective relay proceed as follows 1 Establish time of tripping 2 Determine operating position of on load ta...

Page 189: ... the instant of tripping ð Was the on load tap changer moved immediately before or during trip ping ð Did any other protective devices of the transformer respond at the in stant of tripping ð Were switching operations in the network being carried out at the in stant of tripping ð Were overvoltages registered at the instant of tripping 3 Take further action in agreement with Maschinenfabrik Reinhau...

Page 190: ...strength See technical data TD 61 General Section Alternative insulating fluids Synthetic ester liquid IEC 61099 on request Installation height of the oil conservator See technical data TD 61 General Section Installation height above sea level See technical data TD 61 General Section Table 15 Permissible ambient conditions 8 2 Technical data for protective relay The technical data for the protecti...

Page 191: ...ighest current 2 A at 125 V with cos φ 0 6 Maximum switched current AC highest voltage 1 6 A at 250 V with cos φ 0 6 Switching operations 1 000 cycles Table 18 Switching capacity switching load on an off Dielectric strength AC dielectric strength between all volt age carrying connections and the grounded parts 2 500 V 50 Hz test duration 1 minute AC dielectric strength between the opened contacts ...

Page 192: ...tween all volt age carrying connections and the grounded parts 2 500 V 50 Hz test duration 1 minute AC dielectric strength between the opened contacts 2 000 V 50 Hz test duration 1 minute Table 22 Dielectric strength Ambient conditions Ambient temperature Ta 25 C 50 C Oil temperature 130 C Air pressure Corresponds to 0 m 4 000 m above mean sea level Table 23 Ambient conditions 8 2 1 Protective rel...

Page 193: ...etermined based on IEC 60422 IEC 61203 and IEEE C57 147 Limit values for insulating fluids in ac cordance with IEC 60296 Ud H2O When commissioning the transformer for the first time 60 kV 2 5 mm 12 ppm During operation 30 kV 2 5 mm 30 ppm After maintenance 50 kV 2 5 mm 15 ppm Table 24 Insulating fluids in accordance with IEC 60296 Limit values for synthetic esters in ac cordance with IEC 61099 Ud ...

Page 194: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 194 5293079 01 EN VACUTAP VM Ex 9 Drawings 9 1 VACUTAP VM installation drawing 746230 ...

Page 195: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 195 5293079 01 EN VACUTAP VM Ex VACUTAP VM installation drawing of centrical drive 746230 2 ...

Page 196: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 196 5293079 01 EN VACUTAP VM Ex 9 2 VACUTAP VM 300 installation drawing 765192 ...

Page 197: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 197 5293079 01 EN VACUTAP VM Ex 9 3 VACUTAP VM installation position of selector connection contacts 890477 ...

Page 198: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 198 5293079 01 EN VACUTAP VM Ex 9 4 Special design for bell type tank installation for Um up to 300 kV 896762 ...

Page 199: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 199 5293079 01 EN VACUTAP VM Ex 9 5 Lifting traverse for bell type tank installation 890180 ...

Page 200: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 200 5293079 01 EN VACUTAP VM Ex 9 6 On load tap changer head 893899 ...

Page 201: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 201 5293079 01 EN VACUTAP VM Ex 9 7 On load tap changer head with tap change supervisory control 894109 ...

Page 202: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 202 5293079 01 EN VACUTAP VM Ex 9 8 Pipe connection Q with tap change supervisory control 766161 ...

Page 203: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 203 5293079 01 EN VACUTAP VM Ex 9 9 Tracing template for on load tap changer head 890183 ...

Page 204: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 204 5293079 01 EN VACUTAP VM Ex 9 10 Socket wrench for kerosene drain plug 890182 ...

Page 205: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 205 5293079 01 EN VACUTAP VM Ex 9 11 Screw tools for installation and maintenance 890478 ...

Page 206: ...9 Drawings Maschinenfabrik Reinhausen GmbH 2020 206 5293079 01 EN VACUTAP VM Ex 9 12 Bevel gear CD 6400 dimensional drawing 892916 ...

Page 207: ...kV 2 5 mm maximum electrical field strength without a breakdown arc IEC The International Electrotechnical Commission IEC for short is involved in the preparation and publication of international standards for electri cal electronic and related technologies IP Ingress protection MR Maschinenfabrik Reinhausen GmbH NC Normally Closed contact NO Normally Open contact ...

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Page 210: ...fabrik Reinhausen GmbH Falkensteinstrasse 8 93059 Regensburg 49 0 941 4090 0 sales reinhausen com www reinhausen com 5293079 01 EN VACUTAP VM Ex 08 20 Maschinenfabrik Reinhausen GmbH 2020 THE POWER BEHIND POWER ...

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